Réponses

2013-12-07T18:10:32+01:00
Le quotient de 1 par:

a. 1: \frac{4}{7} = 1x4/1x4 : 4/7 = 4/4:4/7 = 4/4 x 7/4 = 28/16 = 7/4 ou 1,75.
b. 1: \frac{-3}{5} = 1x5/1x5 : -3/5 = 5/5:-3/5 = 5/5x5/-3 = 25/-15 = -5/3 ou -1,666666667.
c. 1: \frac{-2}{11} = 1x11/1x11 : -2/11 = 11/11:-2/11 = 11/11x11/-2 = 121/-22 = -11/2 ou -5,5.

De rien si je t'ai aider !!
2013-12-07T19:10:29+01:00
= 1 : 4/7
= 1 x 7/4
= 7/4

= 1 : (-3/5)
= 1 x ( -5/3)
= -5/3

= 1 : (-2/11)
= 1 x (-11/2)
= -11/2